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Finding the Fourth Proportional to 2,857.55, 4,286.29 and 777.52

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Solution

The fourth proportional to 2,857.55, 4,286.29 and 777.52 is: 1,166.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,857.55 : 4,286.29 = 777.52 : x
  2. Step 2: Convert to fraction form
    2,857.55/4,286.29 = 777.52/x
  3. Step 3: Cross multiply
    2,857.55x = 4,286.29 × 777.52
  4. Step 4: Simplify right side
    2,857.55x = 3,332,665.49
  5. Step 5: Solve for x
    x = 3,332,665.49/2,857.55
  6. Step 6: Final answer
    x = 1,166.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.